Electrical Wiring in the Home/submersible well pump wiring


friend has a submersible well pump that does not run. It has no power to the pump connection and no power to the pressure switch. The pressure switch has 2 wires to it as does the pump. No breakers are tripped in panel and all breakers have voltage off of them. How is the circuit wired? Does the feed go to the pressure switch first? If so why is there only 2 wires to the switch? Is there another location with a contactor or relay that is wired to the pressure switch and than to the pump? Did not find any but water tank and pressure switch are in the attic (because of water table problem)but no voltage there.
Thank you

First, let me say I cannot image what you guys are going through with the storm damage and our thoughts and prayers are with all of you.

Typically, and according to the NEC, you should have some sort of disconnect means at the pump house.
It could be as simple as a switch on the wall (looks like a light switch), or it could be an outdoor rated disconnect (like you see at air conditioners). And it may even be a fused disconnect, but does not have to be fused since you have a circuit breaker.

So that would be the first thing to look for.

There are only two wires at the pressure switch because they are only "switching" one leg. So you would need to read voltage from one connection to ground or to the other leg.
If you are reading voltage across those two wires you will not get a reading.

Let me know what you find.  
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Greg Hughes


Troubleshooting electrical including appliances and HVAC.


34 years of experience.

Both college and tech schools in this field.

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